code: def test_call_cpu(self):
      self._check_call()
  
file_path: chainercv/tests/links_tests/model_tests/fpn_tests/test_faster_rcnn_fpn_resnet.py
imports: import numpy
  import unittest
  import chainer
  from chainer import testing
  from chainercv.links import FasterRCNNFPNResNet101
  from chainercv.links import FasterRCNNFPNResNet50
  from chainercv.links import MaskRCNNFPNResNet101
  from chainercv.links import MaskRCNNFPNResNet50
  from chainercv.utils.testing import attr
label_desc: Use image node_id 3 for calling the TestFasterRCNNFPNResNet obj's underlying member method code with example usage: obj.test_call_cpu() without return types